Printing-machine.



H. STAMM.

PRINTING MACHINE.

APPLIOATION FILED NOV. 11, 19074 BSHEBTS-SHEET l.

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Patentea 12%. 2%, mm.

3 SHEETS-$311:

H. STAMM.

PRINTING MACHINE.

APPLICATION FILED N0v.11, 1907.

the driving UNITED s'rnrns arnnr oi rron.

HENRI STAMM, or REUTzseHMUnLE, NEAR GREIZ, GERMANY.

PRINTING-MACHINE Specification of Letters Patent.

Patented Dec. 29, 1908.

Application filed November 11, 1907. Serial No. 401,756.

' s'chmiihle, near Greiz, Germany, have invented certain new and useful Improvements in Printing-Machines, of which the following is a specification.

Printing machines with continuously'and uniformly rotating printing cylinders have frequently complicated arrangements for driving the carriage of the forms so as to perform a to and fro movement underneath the cylinder. the carriage by means of a crank movement as same would not effect a velocity uniform and corresponding to that of the cylinder.

The invention described herein relatesv to of the carriage by means of a crank movement which receives the impulse from the printingcylinder itself.

I will now describe my invention with reference to the accompanying drawings in Wlli0l1.

Figures 1 and 2 show my invention in cross section and front view respectively. Figs. 3

4 and 4 show modifications of same in section.

Fi 5 is a vertical section of a modification.

The impression cylinder, D (Fig. 1) works in the same manner as in usual printing machines, the sheets ,coming from the table or plate T being grip ed by the grippers G and after being prlnte upon, are conducted over guide roller M, the shaft of which may be used as the drivin shaft of the-machine, to the fly A, Which pi es them up on a table arrangpd adjacent to it.

T e flat form S lies on the carriage F so as to perform a swinging movement which is effected by means of cranks, or crank disks K, mounted on the shaft of the impression cylinder, and by means of tie-rods Z, directly engagingwith shaft Q arranged in the ear-- riage. This movement is effected in such a manner that at the upward travel of the form for its whole length contact of the form with the cylinder takes place, the result being the same as if duringthis phase an engagement of the form with the cylinder by means of a rack at the side of the former and gear wheel arranged on the latter, would tase place, which rack and gear wheel however may be provided in addition to the above arrangement for the purposes of correcting inaccuracies. The llat form is g1 ided in its engagei ment with .the curved cylinder strface by means of suitably shaped curved blocks V It has not been attempted to drive,

which are arranged on the lower ends of the sidewalls of the carriage, and which are in contact with rollers R mounted on a horizontal shaft, by means of which said blocks are moved up and down. The center of ro- 'tation of the carriage F (pivot B) is guided in its up and down moveme'ntby the swinging arms H; but this could also be effected in any other manner, for instance by means of slots in the side walls or the like.

The correct guiding of the form underneath the printing cylinder D is effected by arranging the parts of the crank system in certain determined positions and relations to each other, as stated in the following:

In the construction as shown in Fig. 1 the i ima inar lane assin throu h the ivots of the rod s fZ on t e disis K an don al carriage F is required to pass in any position of the printing cylinder through the point of contact of cylinder and form, as this is indicated in Fig. 1 with regard to the middle position. This is effectedin the following manner: Startirm from the middle position (Fig. 1) the cylinder D is imaginedto roll on the form, while the carriage is imagined to re main in the position shown in this figure. The center of a crank pivot P will then'describe an arc. After determining the radius of the latter the length of the tie-rod Z is made e ual to same, and the center of rotation of t 1e said tie-rod is chosen as the center of the arc of a circle. It is evident that then the positions of the form S. and the cylinder D Wlll bein the same relation to each other as if an engagement of these two parts by means of gears would take lace. It is a matter of course that when etermining the relation of the positions consideration must be had asto conditions for the-proper working of the crank system; provision must also be made for a proper am litude of the carriage F for the pur ose of inking the form.

The inking is e 'ected in a manner well known by means of two rollers N, which receive the ink from the curved cushion E, which receives ink from the ink-case U b means of roller L, rollers C serving to ru and distribute the ink on. the surface E.

The latter is made integral with theswinging carriage F and is so arranged as to enable it to swing therewith for the purpose of facilitating the distribution of ink on it, the swinging motion being effected by suitable means.

With the construction described abovea even larger t machines, in comparison with the to travel of the impression cylinder can be obtained by the modifications of the arrangements shown'in Figs. 3, '4, 5.

The modification shown in Fi' 3 differs from the construction described a ove in the arrangement of the carriage F, which, in this case, similarly as in rotary machines, swings around a fixed center-that is to say the axle of which is arranged iIl fixed bearings. The impression cylinder D has also a fixed center of rotation O, and as in.certain rotary machines, is arranged eccentrically, as indicated in Fig. 3'. In order to effect with this construction the contact of the eccentric impr'e sion surface with the form S during the I whole time 'of-the upward travel of latter, 25

'the pgiitions of cylinder and form must be dete 'ned ,in a certain relation which can be fourid in the following manner. The carriage F is again imagine to remain in its position and the-cylinder D to roll over the form S from one end of same to the other. The eccentrically arranged axle, or shaft 0 would then describe a line which for practical purposes may be represented with sufficient ap roximation by an arc, O, O The oscillation of the-carriage is effected in the same manner as in the construction of Figs. Land 2, b means of tie-rod Z which connects cra ivot P (arranged on or in connection with t e impression cylinder) with the pivot Q on the carriage.

The pro er passage of the form S is determined m t e ollowmg manner: The radius P O is taken and is marked on-arc O 0' both ways from the'point of crossing of same with are 'P P. The same distance P O is then struck from the points thus obtained onto the are P P at 1, 2,-8. Radii are then drawn from points on these arcs'to their centers. A line drawn through the points ofcrossin of these radii, (said points being marke correspondingly 1-8,) determines thefaceof form S.

The ima inary circumference of the cylinder, which as to be considered with regard to the introduction of the sheets and transp ortation of same to roller M, is indicated in ig. 3 b a circle in dotted lines, which touches t e farthest oint of the eccentrically shaped cylinder. The path which the eccentric pivot travels is shown in Fig. '3 by a se ment-like curve, drawn in dotted lines. it is evident that the cylinder moves a considerable distance from the form during the phase of the return travel which makes it possible to employ for the purpose of inking cease? the form a larger number of to and fro moving ink rollers, instead of the roller N, (Fig. 3).moving in slots.

' Small deviations from the mathematically calculated construction of the e'ccentrio cylinder can be corrected by means of corresponding shaping ofsame; or in a similar manner as in Fig. 1 by means of providing the carriage with eccentrics V.

The lar est form is obtained by means of the mod' ication shown in Fig. 4, in which same is equal to one half of the circumference of the c linder, the result bein approximately t e sameas with an ordinary tworevolution printing machine. While however in the latter'machine the cylinder has to perform two rotations for each impresslon, only one rotation is necessary'in'my machine, so'that compared with the number of rotations with the same diameter of cylinder, and same speed, the effect is double that hitherto attained. The effect however can be redoubled'by means of the construction.

shown inFig. 5, in which two systems of the kind shown in Fig. 4 are arrangedround a single cylinder D. -In thiscase the whole of thecircumference of the cylinder is used as an impression surface, as is the case in rotary rinting machines. Itis therefore possible with the system invented by me 'to print upon endless form travfelin speed of same, with a flat form and sing e cylinder rotating at uniform velocity;

The arrangement of the different parts is similar in the construction of Fi 4 to that paper at a continuously uni of Fig.3, from which it difiers o y in the ar rangement of the printing cylinder, which is not arranged eccentrically as in Fig. 3,; but i concentrically.

The ri id connection of pivots and B by ,means o tie-rod Z, Fi 4 with employment of O as crank pivot 15 maintained. Thus two crank pivots O and P are obtained which are connected with pivots B and Q b means of'tie-rods Z and Z respectively. T e addition of a new link'H however is necessitated in this construction in order to guide the ivot B in any required direction, said pivot movable in this construcbeing free and tion, it does not matter whether this guiding arrangement (which however was necessary in Fig. 1) is provided on pivot B or'on pivot Q. s in t e construction of Fig. 1" the guiding of ivot B can also be effected by means of s ots in the side walls, instead of lever H. I

The arrangements the construction of in different ways. instance may be. arranged on different of the driving parts in T c cranks O and P for sides Fi 4 can be carried out of the machine, one on the left hand and the ther the ri ht hand side as shown in Fig. 4, or with both or one only constructed as counter cranks; Further, ,oiiljy one of the of the machine,.the di arranged in geometrically similar or equal anism constructed to obtain its two crank movements could i be obtained from the cylinder shaft and the oscillation of lever H could be effected by means of a separate cranked shaft, arranged on another part erent parts being proportions and positions. Crank canalso be replaced by eccentrics.

Other modi cations may be made without pivots 10. thereby'devi'ating from the principle of my lnvention. 1

Having now particularly described and ascertained the nature of my said inventin and in what manner the same is to be per- 15 formed I declare that iwhatlfclaim is:

1. -In a printing maehinethe combination with a constantly*rotating cylinder, of a form carriage mounted fortd' and ire swi ing movement, and a crank driving mee impulse from the impression cylinder, a tie rod connecting the impression cylinder with a pivot on the carriage, means, constructed to cause the lower part of the carriage to move in a curved path to guide the swinging form during its enga ement with the impression cylinder.

2. n a printin machine the combination with a constant y rotating cylinder, of a i In the presence of form carriage mounted for to and fro swinging movement, and acrank driving mechanism constructed to obtain its impulse from the impression cylinder, a'tie rod connecting the impression cylinder with a pivot on the carriage, means constructed to cause the lower part of the carriage to move in a curved pathto guide the swinging form during .its engagement with the impression cylinder, said impression cylinder, being 7, arranged eccentrically.

3. 'In a printing machine the combination with a constantly rotating cylinder, of a form carriage mounted for to and fro swingmg movement, and a crank driving mechanism constructed to obtain its impulse from the impression cylinder, a tie rod connecting the mpression cylinder with a pivot on the carriage, meansconstructed to cause the lower part-of the carriage to move in a curved path to guide the swinging form during its engagement with the impression I cylinder, said carriage having a flat face.

In testimony whereof I aflix'my signature. HENRI STAMM.

v :MORITZ BAUER, Seur,

WM. H. H. SPIELMEYER. 

